Improvement in dry gas-meters



UNTTED STATES PATENT Trice.

DAVID ALCOBN, OF NEW YORK, N. Y.

IMPROVEMENT IN DRY GAS-METERS.

ToaZZ whom it may concern.:

Be it known that I, DAVID ALCORN, of the city of New York, in the State of New York, have invented a new and useful Improvement in Dry GasMeters 5 and I do hereby decla-re that the .following is a full, clear, and exact description of the construction and operation of the same, reference being had to the accompanying drawings, making a part of this specification, in which- Figures l and 2 are sectional side elevations (the side plates being removed) of a dry gas-meter having my improvement applied thereto; Fig. 3, a view of the under side ot' the valve-disk, and Fig.' 4 a diainetral section of the same; Fig. 5, a view ofthe upper side of the valveseat; and Fig. 6, a sectional vertical section of the seat, applied through the dotted line x of Fig. 5, like letters indicating the same parts when in the di'erent figures.

The presentv improvement relates to those dry gas-meters which are provided with what are called eccentric rotary valves;7 and the nature of my invention consists, substantially as hereinafter described and specified, in diminishin g the rubbing-surface and increasing the area of the ports in a peculiar manner without increasing the area of the valve-seat, for the purposes of reducing the friction of the valve and expediting the passage of the gas through the same; in casting or constructing the said valve seat and part of its inlet-channel in one piece, for the purpose of reducing the cost of construction, and in arranging that portion of the supply-channel which is within the meter and connects the external or inlet tube with the entrance-port of the valve in an oblique position in relation to the said tube and valve, for the purpose of preventing, in a better manner, the deposits which take place in the tube and channel from reaching the valve. y

In the drawings, A is the central vertical partition, and B the horizontal partition, of the meter; C, the valve-seat, and D its moving disk; E, the external or inlet tube, and F the oblique channel which leads from the lower part of the said tube E to the entranceport of the valve.

Instead of making the ports of vthe valveseat of the circular form as heretofore, I construct them of the curved form shown at c 02 c3 c4 c5 in Fig. 5, and consequently without that it shall have. as a solid part ofthe same,

the hollow downward projection or elongation 0', whereby when the seat is applied the required channel from the vusual hole in the vertical partition A to the central port, 5, of

the valve is afforded with greater facility and economy of construction than heretofore. The channel F, when applied as shown in the drawings, Yaffords an obliquely-asccnding passageway for the gas from the lower part of the inlet-tube E to the lower part of the central port, 5, of the valve C, and consequently produces, in connection with the said lower part of the tube E, an angular reservoir, which receives the accumulating deposits from the gas, and also retains the same until a cessation of the flow of the gas gives notice that the reservoir is full and that the outlet e needs opening for the restoration of the flow of the gas. This, it will be seen, is a very simple and effective arrangement for i preventing the deposits from the gas in the inlet tube and the channel from reaching the valve, and for discharging the deposits when necessary.

Having thus fully described my improvement in dry gas-meters, and pointed out its utility, what I claim as my invention, and desire to secure by Letters Patent as new there- 1n, 1s

l. Making the portopenings of the valveseat C substantially in the enlarged and curved form set forth and described, for the purposes specified.

2. Casting or constructing the valve seat G and its hollow projection or elongation c6 together in one solid piece, substantially as described and set forth, for the purposes specitied.

3. Arranging the channel F in an oblique position in relation to the valve and to the inlet-tube -E, as described and set forth, for the purposes specified.

DAVID ALUORN.

Witnesses:

T. G. ARNOLD, DAVID MGADAM. 

